Magnetic Field Effects on Convective Heat Transfer of Ferrofluid from a Heated Sphere in Porous Media | ||
| Journal of Heat and Mass Transfer Research | ||
| دوره 12، شماره 1 - شماره پیاپی 23، مرداد 2025، صفحه 177-192 اصل مقاله (1.06 M) | ||
| نوع مقاله: Full Length Research Article | ||
| شناسه دیجیتال (DOI): 10.22075/jhmtr.2024.33841.1554 | ||
| نویسندگان | ||
| Ayesha Aktar1؛ Sharaban Thohura1؛ Md. Mamun Molla* 2، 3 | ||
| 1Department of Mathematics, Jagannath University, Dhaka-1100, Bangladesh | ||
| 2Department of Mathematics & Physics, North South University (NSU), Dhaka-1229, Bangladesh | ||
| 3Center for Applied and Computational Sciences (CACS), NSU, Dhaka-1229, Bangladesh | ||
| چکیده | ||
| The impact of a magnetic field on the convective heat transfer of ferrofluids from a heated sphere immersed in a porous medium is investigated. The dimensional governing boundary layer equations are initially transformed into a convenient non-dimensional form utilizing the non-dimensional variables. The resulting nonlinear systems of equations are then numerically solved inside the computing domain into a regular rectangle using the effective Finite Difference Method (FDM). Numerical outcomes are then represented in terms of local Nusselt number, velocity, temperature profile, and skin friction coefficient, respectively for a range of porosity parameters, ϵ = 0.4, 0.6, 0.8, magnetic effect parameter or Hartmann number, Ha = 0.0, 1.0, 3.0, 5.0 and the ferroparticle volume fraction coefficients, ϕ = 0%, 2%, 4%, 6%. It is thought that the base fluid’s Prandtl number, Pr=6.8733, is constant. In addition, the flow pattern inside the boundary layer region is shown using streamlines and isotherms, and the underlying physics of the flow behavior is then explored. There is a graphical presentation of the data. The findings show that velocity decreases with increasing value Ha, ϕ and ϵ. An increase in the Hartmann number Ha causes the temperature to rise. The local N_u and C_(f )are decreasing as Ha and ϕ values increase. With an increase in the porosity parameter ϵ and ϕ, the temperature profile rises and the C_f and local N_u decrease. For increasing Ha, the figure of streamlines seems to depict functions with more gradual changes, and for isotherms, it represents functions with sharper, exponential-like increases. While many works focus on ferrofluids or porous media individually, combining the study of heat transfer in ferrofluids within porous structures can represent a distinct focus. The problem is crucial for developing advanced heat transfer technologies for more efficient energy management in various engineering applications. | ||
| کلیدواژهها | ||
| Magnetohydrodynamic؛ Ferrofluid؛ Heated sphere؛ Porous media؛ Heat transfer؛ Finite difference method | ||
| مراجع | ||
|
| ||
|
آمار تعداد مشاهده مقاله: 1,380 تعداد دریافت فایل اصل مقاله: 704 |
||
| تعداد نشریات | 22 |
| تعداد شمارهها | 723 |
| تعداد مقالات | 10,397 |
| تعداد مشاهده مقاله | 72,866,910 |
| تعداد دریافت فایل اصل مقاله | 64,557,816 |